Atoms and reactions

Question 1

Define atomic number

Answer 1

number of protons in an atom or ion

Question 2

Define mass number

Answer 2

number of protons and neutrons

Question 3

Define RIM

Answer 3

mass of atom/isotope of the element compared with 1/12th of mass of 12C atom

Question 4

Define RAM

Answer 4

weighted mean mass of atom of the element compared with 1/12th of mass of 12C atom

Question 5

Calculation?

Answer 5

Mass number x Relative abudance

over 100

Question 6

Define mole

Answer 6

amount of substance that contains as many particles as there are atoms in 12g of carbon 12

Question 7

Define molar mass

Answer 7

mass per mole of substance

Question 8

Define empirical formula

Answer 8

Simplest whole number ratio of atoms of each element

Question 9

Define molecular formula

Answer 9

Actual number of atoms of each element

Question 10

define anhydrous

Answer 10

No water

Question 11

Percentage yield

Answer 11

n of product/ n of reactant x100

Question 12

Atom economy

Answer 12

Mr of desired product /Mr of all products

Question 13

Define acid

Answer 13

proton donor

Question 14

define base

Answer 14

Proton acceptor

Question 15

Alkali

Answer 15

soluble base that releases OHi in aqueous

Question 16

Salt

Answer 16

Acid has one or more of H+ replaced by metal ion or NH4+